Hope this might help some one save some time or generate some ideas. Many of the icons (and even the design) were borrowed and modified from other submissions on Remote Central - though some have been created (those for XM radio stations). Device codes are on hidden pages and all other buttons are aliased so the codes can be adapted for other models with minimal effort.

198 XM radio station icons in 4-bit B&W for the Pronto. All stations on the XM playlist as of March, 2004. Previews below are shown smaller than original size.